/Engine/Source/Developer/MeshBuilder/Public/MeshDescriptionHelper.h
void ReduceLOD ( const [FMeshDescription](API\Runtime\MeshDescription\FMeshDescription) & BaseMesh, [FMeshDescription](API\Runtime\MeshDescription\FMeshDescription) & DestMesh, const struct [FMeshReductionSettings](API\Runtime\Engine\Engine\FMeshReductionSettings) & ReductionSettings, const [FOverlappingCorners](API\Runtime\MeshUtilitiesCommon\FOverlappingCorners) & InOverlappingCorners, float & OutMaxDeviation )